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Besides the RADEON drivers still not have this support.
the last drivers release today in ppa's for ubuntu with xorg1.13 and up.
Now, when using the xorg.conf and being specific with the radeon driver and pci device. The system boot well, didn't crash, didn't give error about link/atom bios crash. and i know the system can boot perfect. BUT i cant see the screen YET. If i type the password ( doing this in a blind way) everything load ( i can rear) But i cant See it. no error in xorg.log or dmesg.

A BIG STEP AHEAD

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If you manage to be a bit specific about the exact versions of involved software you use you might want to file a bug report. I can't test it because my notebook only has one card but my xrandr from git says this:

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If you manage to be a bit specific about the exact versions of involved software you use you might want to file a bug report. I can't test it because my notebook only has one card but my xrandr from git says this:

It's not a bug at all. And i'm talking about AMD RADEON not NVIDI+bumblebe
from what i Understand it's a behaviour.
Radeon driver loads now perfect. but still not the output from intel card.
Before, when the radeon driver loaded and didn't find the output monitor, he break giving a error and crashing the xorg. now the xorg load. didnt crash anymore. Just doesn't show nothing because there is not physical output from radeon ( output still being owned by the intel hardware).
They are aware of this. Not rush with more one bug filled. Just wait they do the work they are being done.

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It's not a bug at all. And i'm talking about AMD RADEON not NVIDI+bumblebe
from what i Understand it's a behaviour.
Radeon driver loads now perfect. but still not the output from intel card.
Before, when the radeon driver loaded and didn't find the output monitor, he break giving a error and crashing the xorg. now the xorg load. didnt crash anymore. Just doesn't show nothing because there is not physical output from radeon ( output still being owned by the intel hardware).
They are aware of this. Not rush with more one bug filled. Just wait they do the work they are being done.

So the drivers are PRIME-aware, in that multiple GPU's no longer causes an exception / crashes Xorg, but not PRIME-usable, in that output is still broken?

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So the drivers are PRIME-aware, in that multiple GPU's no longer causes an exception / crashes Xorg, but not PRIME-usable, in that output is still broken?

Yeap. Exact "So the drivers are PRIME-aware, in that multiple GPU's no longer causes an exception / crashes Xorg, but not PRIME-usable"

A big step ahead from last years. Lets wait until RADEON driver get the prime ( or better ) support to. And AMD cards have a more mature way to play like NVIDIA.

Funny is that linux is the oposite from Microsoft.
At the release. Microsoft get the drive working, but late, when they stop to release drivers. Everything become fucked and you cant use your hardware anymore ( just look ahead IF manufacturer like hp will release some driver for WIN8. If same for the new one they are not ).

Linux sometimes is slow to get some hardware support. but when this come. STAY THERE, STRONG.

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Maybe Dave Airlie would know best, just because it was his work that lead us to RandR 1.5, but does anyone know how much work its going to be for the drivers to know when to switch between the two graphics cards? From what I've read through the articles now with Xorg 1.13 we can have both GPU's working together and their graphics buffers can be shared. Awesome. If one card isnt doing work, Xorg can issue power management commands to turn off the piece of hardware. Awesome.

On mac and windows, the OS can decide when a graphics load is heavy enough that it should switch from the integrated card to the discrete card. Does Xorg (or would it be possible with more refactoring / updating) have a way to detect which graphics card is better? Does it have a way to measure GFX load and set a threshold for when it should move the GFX load to the discrete card, turning it on in the process of a reasonable number of vsync's, or when the load is low enough that it can move b ack the integrated card and turn off the discrete card, also within a reasonable number of vsync's?

Not trying to discredit everyone's work on PRIME, i'm just trying to get a good feel of where the linux community truely stands on the issue of hybrid graphics at this point now that we have support for multiple GPU's.